Liebert UPS System user manual LCD indication for fault information

Chapter 7 Troubleshooting

7.4 LCD indication for fault information

The LCD on the UPS displays the fault information of Table 7-1 and Table 7-2. The user should locate and analyze the fault according to the tables and feedback the fault information to our service engineers.

Table 7-1

Fault information

No.1

Fault description

Reason

Actions to be taken

1

Communication of

Communication between monitoring

Notify the service engineer for repairing

inverter fails

unit and inverter fails

2

Communication of

Communication between monitoring

Notify the service engineer for repairing

rectifier fails

unit and rectifier fails

3

Ambient over-

over-temperature of UPS room

Check the ventilation of UPS room

temperature

4

Environment

Environment

parameter

channel

1

Check the devices relating to the channel

parameter 1 abnormal

has alarm

5

Environment

Environment

parameter

channel

2

Check the devices relating to the channel

parameter 2 abnormal

has alarm

6

Environment

Environment

parameter

channel

3

Check the devices relating to the channel

parameter 3 abnormal

has alarm

7

Environment

12V environment parameter channel

Check the devices relating to the channel

parameter abnormal

has alarm

8

Rectifier

input

voltage

Line-to-neutral

voltage

of

rectifier

Check

the

line-to-neutral

voltage

abnormal

exceeds normal operation range

amplitude of rectifier

Rectifier

input

under-

Line-to-neutral voltage of rectifier

Check

the

line-to-neutral

voltage

9

lower than

305V, but

higher

than

voltage

208V

amplitude of rectifier

Rectifier’s input

Rectifier

frequency exceeds

the

Check

the

rectifier’s

input

voltage

10

voltage frequency is

normal range

frequency

abnormal

11

Input fuse blows

Rectifier input fuse blows up

Notify the service dept for repairing

12

Input transformer over

Temperature of input transformer is

Check

the

ambient temperature

and

temperature

too high

ventilation

13

Input phase

rotation

Rectifier’s

input

phase

rotation

is

Notify

the UPS service

engineer,

check

reverse

reverse

the wiring of rectifier input cables

14

Input softstart fails

Input softstart fails

Notify the service dept for repairing

83